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[#9] Add a cli tool to access the api server API
The Jolokia api-server comes with a cli (command line interface) tool. When the cli tool starts it connects to the api-server and can access the jolokia endpoints. The cli tool takes a **command** and requests the api-server using [its api](src/config/openapi.yml) to invoke on the target jolokia endpint, gets back the response and printing the result to the console in JSON format. It can run in `interactive mode` or in `non-interactive` mode. To build the cli tool run ``` yarn build ``` which will build both the api-server and cli tool. To install the cli tool runnable locally run: ``` npm link ``` It will create the cli runnable `jolokia-api-server-cli` The cli tool needs a running api-server. To start the cli tool run ``` jolokia-api-server-cli [options] ``` or you can use `yarn` ``` yarn start-cli [options] ``` In this mode, the tool starts and execute a command and then exits. The syntax for non-interactive mode is: ``` jolokia-api-server-cli <command> -l <api-server-url> -e <jolokia-endpoint-url> ``` If `-l` option is omitted the default is ` https://localhost:9443` The `-e` option is the target jolokia url. for example ``` -e http://user:[email protected]:8161 ``` If the port number part is omitted, the default is `80` for http and `443` for https. The `command` is the command to be executed. Note in non-interactive mode the `command` need be quoted if 1. the command contains options (e.g -e) because the '-' can be interpreted by the shell 2. the command contains '*' char Example: ``` jolokia-api-server-cli "get queue TEST -a MessageCount RoutingType" -e http://user:[email protected]:8161 ``` Alternatively you can use `--` to separate the command: ``` jolokia-api-server-cli -e http://user:[email protected]:8161 -- get @broker2/queue DLQ -a MessageCount ``` In interactive mode the tool starts into a command shell and accepts user input as a command, then it executes it and went back to the shell prompt to accept another, until you run the `exit` command. The syntax to run the cli in this mode is ``` jolokia-api-server-cli -i ``` When it starts it print the cli title and ready to accept commands. With interactive mode the cli can 'caches' a list of jolokia endpoints (added by the `add` command only available in interactive mode). It takes one of them as `current endpoint` so when user types a command without specifying target jolokia endpoint, the `current endpoint` will be used. This is the only available command currently. It can retrive information from a jolokia endpoint. The syntax of this command is ``` get <path> <name> <-a attributes...> <-o operations...> ``` It takes a `path` argument, a `name` argument, an optional `-a`(attribute) option and an optional `-o` (operation) option. The value of `path` is a string representing a target mbean from which you want to get information. It takes the form [target endpoint]/[component]. The `target endpoint` in `interactive` mode allows you to specify which broker you want to retrieve information from. If absent it takes the current broker cached by the cli. In non-interactive mode that [target endpoint] can be empty if `-e` option is given, or it is the target remote endpoint name prefix by a `@` char. For example `@broker1/` The `component` part is the type of the mbean. Currently the supported mbean types are - `queue` - `address` - `acceptor` - `cluster-connection` --- **NOTE** If the target component is the broker itself, the component should be left empty. For example `get @broker1/ -a Status` It means to get the value of `Status` attribute of the broker. --- The <name> argument is the mbean name (e.g. DLQ, testQueue, etc). The value of `-a` option is a list of attribute names (space or comma separated) to read from the target mbean. If the value is a `*` it will read all the attributes of the target mbean. The value of `-o` option is a list of operation names (space or comma separated) to read from the target mbean. If the value is a `*` it will read all the operations of the target mbean. examples: `get @broker1/` - get the current broker mbean information `get @broker1/*` - get all mbeans registered with the broker mbean `get @broker1/ -a *` - read all the attributes of the broker mbean `get @broker1/ -a * -o *` - read information of all attributes and operations of the broker mbean `get @broker1/queue` (or `get /queue`) - list all the queue mbeans information `get @broker1/acceptor acceptor0 -a *` - read all attributes of acceptor named `acceptor0` `get @broker1/queue TEST -a MessageCount RoutingType` - read `MessageCount` and `RoutingType` of queue `TEST` `get @broker1/queue -o xxx` - read information of operation xxx of queue TEST The `run` command is used to invoke operations on a jolokia endpoint. The syntax of this command is ``` run <path> <name> <operation> ``` It takes a `path` argument, a `name` argument and an `operation` to be executed on the mbean. The syntax for `path` and `name` are the same as for the `get` command. The operation takes the form <operation-name>([args...]). For example ``` run @broker1/ listAddresses(m) ``` It means to call listAddresses(java.lang.String) method on @broker1 with argument value 'm'. There are several commands that are only available to interactive mode. Add a jolokia endpoint to the cli cache. Syntax: ``` add <endpoint name> <url> -u <user> -p <password> ``` example: ``` add ex-aao-ssl https://ex-aao-ssl-wconsj-0-svc-rte-default.apps-crc.testing -u user -p password ``` This command allows user to add a jolokia endpoint that is not managed by the api-server. After the endpoint is added the user can access the endpoint using the cli commands. --- **NOTE** When accessing such jolokia endpoints, the command references it without `@` prefixed, for example `get ex-aao-ssl/ -a Status` --- To change `current endpoint`. Syntax: ``` switch <endpoint name> ``` example: ``` switch broker0 ``` A command can be simplified if it is targeted at the current endpoint. For example if you set the current endpoint to `broker0` the command ``` > add broker0 http://127.0.0.2:8161 -u guest -p guest ``` and if you want to get the queues of the broker0, you can do ``` get /queues ``` instead of explicitly: ``` get broker0/queues ``` To list all the jolokia endpoints cached in cli and managed on the api-server. Syntax: ``` > list [ "local2(local): http://127.0.0.2:8161", "@pod-0: https://broker-pem-wconsj-0-svc-ing-default.artemiscloud.io:443", "@pod-1: https://broker-pem-wconsj-1-svc-ing-default.artemiscloud.io:443", "@Local: http://127.0.0.1:8161", "@restricted: https://artemis-broker-jolokia-0-svc-ing-default.artemiscloud.io:443" ] ```
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